using namespace std;

#include<vector>

class Solution {
public:
	bool isBoomerang(vector<vector<int>>& points) {
		vector<int> v1 = { points[1][0] - points[0][0], points[1][1] - points[0][1] };
		vector<int> v2 = { points[2][0] - points[0][0], points[2][1] - points[0][1] };
		return v1[0] * v2[1] - v1[1] * v2[0] != 0;
	}
};
